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add noexcept, move impl to detail

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This commit is contained in:
neargye 2019-03-21 14:16:06 +05:00
parent 421dd51583
commit 7fb936bc3e
1 changed files with 28 additions and 30 deletions
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58
include/nameof.hpp
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@ -56,7 +56,7 @@ constexpr bool is_bracket(char s) noexcept {
return s == ')' || s == '}' || s == '>' || s == '(' || s == '{' || s == '<'; return s == ')' || s == '}' || s == '>' || s == '(' || s == '{' || s == '<';
} }
constexpr std::string_view pretty_name(std::string_view name, bool with_suffix) { constexpr std::string_view pretty_name(std::string_view name, bool with_suffix) noexcept {
for (std::size_t i = name.size(), h = 0, s = 0; i > 0; --i) { for (std::size_t i = name.size(), h = 0, s = 0; i > 0; --i) {
if (h == 0 && is_lexeme(name[i - 1]) && !is_bracket(name[i - 1])) { if (h == 0 && is_lexeme(name[i - 1]) && !is_bracket(name[i - 1])) {
++s; ++s;
@ -114,26 +114,26 @@ constexpr std::string_view pretty_name(std::string_view name, bool with_suffix)
} }
template <typename T> template <typename T>
constexpr int nameof_enum_impl_() { constexpr int nameof_enum_impl_() noexcept {
#if defined(__clang__) #if defined(__clang__)
return sizeof(__PRETTY_FUNCTION__) - sizeof("int nameof::detail::nameof_enum_impl_() [T = ") - sizeof("]") + 1; return sizeof(__PRETTY_FUNCTION__) - sizeof("int nameof::detail::nameof_enum_impl_() [T = ") - sizeof("]") + 1;
#elif defined(__GNUC__) #elif defined(__GNUC__)
return sizeof(__PRETTY_FUNCTION__) - sizeof("constexpr int nameof::detail::nameof_enum_impl_() [with T = ") - sizeof("]") + 1; return sizeof(__PRETTY_FUNCTION__) - sizeof("constexpr int nameof::detail::nameof_enum_impl_() [with T = ") - sizeof("]") + 1;
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
return sizeof(__FUNCSIG__) - sizeof("int __cdecl nameof::detail::nameof_enum_impl_<") - sizeof(">(void)") + 1; return sizeof(__FUNCSIG__) - sizeof("int __cdecl nameof::detail::nameof_enum_impl_<") - sizeof(">(void) noexcept") + 1;
#else #else
return 0; return 0;
#endif #endif
} }
template <typename T, T V> template <typename T, T V>
constexpr std::string_view nameof_enum_impl() { constexpr std::string_view nameof_enum_impl() noexcept {
#if defined(__clang__) #if defined(__clang__)
const auto str = __PRETTY_FUNCTION__; const auto str = __PRETTY_FUNCTION__;
const auto size = sizeof(__PRETTY_FUNCTION__) - 1; const auto size = sizeof(__PRETTY_FUNCTION__) - 1;
const auto prefix = sizeof("std::string_view nameof::detail::nameof_enum_impl() [T = ") + nameof_enum_impl_<T>() + sizeof("; V = ") - 2; const auto prefix = sizeof("std::string_view nameof::detail::nameof_enum_impl() [T = ") + nameof_enum_impl_<T>() + sizeof("; V = ") - 2;
const auto suffix = sizeof("]") - 1; const auto suffix = sizeof("]") - 1;
return {str + prefix, size - prefix - suffix}; return detail::pretty_name({str + prefix, size - prefix - suffix}, false);
#elif defined(__GNUC__) #elif defined(__GNUC__)
const auto str = __PRETTY_FUNCTION__; const auto str = __PRETTY_FUNCTION__;
const auto size = sizeof(__PRETTY_FUNCTION__) - 1; const auto size = sizeof(__PRETTY_FUNCTION__) - 1;
@ -144,8 +144,8 @@ constexpr std::string_view nameof_enum_impl() {
const auto str = __FUNCSIG__; const auto str = __FUNCSIG__;
const auto size = sizeof(__FUNCSIG__) - 1; const auto size = sizeof(__FUNCSIG__) - 1;
const auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_enum_impl<") + nameof_enum_impl_<T>(); const auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_enum_impl<") + nameof_enum_impl_<T>();
const auto suffix = sizeof(">(void)") - 1; const auto suffix = sizeof(">(void) noexcept") - 1;
return {str + prefix, size - prefix - suffix}; return detail::pretty_name({str + prefix, size - prefix - suffix}, false);
#else #else
return {}; return {};
#endif #endif
@ -153,7 +153,7 @@ constexpr std::string_view nameof_enum_impl() {
template <typename T, int I> template <typename T, int I>
struct nameof_enum_t { struct nameof_enum_t {
constexpr std::string_view operator()(int value) const { constexpr std::string_view operator()(int value) const noexcept {
switch (value - I) { switch (value - I) {
case 0: case 0:
return nameof_enum_impl<T, T{I}>(); return nameof_enum_impl<T, T{I}>();
@ -179,12 +179,12 @@ struct nameof_enum_t {
template <typename T> template <typename T>
struct nameof_enum_t<T, NAMEOF_ENUM_MAX_SEARCH_DEPTH> { struct nameof_enum_t<T, NAMEOF_ENUM_MAX_SEARCH_DEPTH> {
constexpr std::string_view operator()(int) const { constexpr std::string_view operator()(int) const noexcept {
return { "nameof_enum::out_of_range" }; return { "nameof_enum::out_of_range" };
} }
}; };
constexpr std::string_view nameof_type_impl_(std::string_view name) { constexpr std::string_view nameof_type_impl_(std::string_view name) noexcept {
#if defined(_MSC_VER) #if defined(_MSC_VER)
if (name.size() > sizeof("enum") && name[0] == 'e' && name[1] == 'n' && name[2] == 'u' && name[3] == 'm' && name[4] == ' ') { if (name.size() > sizeof("enum") && name[0] == 'e' && name[1] == 'n' && name[2] == 'u' && name[3] == 'm' && name[4] == ' ') {
name.remove_prefix(sizeof("enum")); name.remove_prefix(sizeof("enum"));
@ -204,7 +204,7 @@ constexpr std::string_view nameof_type_impl_(std::string_view name) {
} }
template <typename T> template <typename T>
constexpr std::string_view nameof_type_impl() { constexpr std::string_view nameof_type_impl() noexcept {
#if defined(__clang__) #if defined(__clang__)
const auto str = __PRETTY_FUNCTION__; const auto str = __PRETTY_FUNCTION__;
const auto size = sizeof(__PRETTY_FUNCTION__) - 1; const auto size = sizeof(__PRETTY_FUNCTION__) - 1;
@ -221,55 +221,53 @@ constexpr std::string_view nameof_type_impl() {
const auto str = __FUNCSIG__; const auto str = __FUNCSIG__;
const auto size = sizeof(__FUNCSIG__) - 1; const auto size = sizeof(__FUNCSIG__) - 1;
const auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_type_impl<struct nameof::detail::identity<") - 1; const auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_type_impl<struct nameof::detail::identity<") - 1;
const auto suffix = sizeof(">>(void)") - 1; const auto suffix = sizeof(">>(void) noexcept") - 1;
return nameof_type_impl_({str + prefix, size - prefix - suffix}); return nameof_type_impl_({str + prefix, size - prefix - suffix});
#else #else
return {}; return {};
#endif #endif
} }
} // namespace detail
template <typename T, template <typename T,
typename = typename std::enable_if<!std::is_reference<T>::value>::type> typename = typename std::enable_if<!std::is_reference<T>::value>::type>
constexpr std::string_view nameof(std::string_view name, bool with_suffix = false) { constexpr std::string_view nameof_impl(std::string_view name, bool with_suffix = false) noexcept {
return detail::pretty_name(name, with_suffix); return detail::pretty_name(name, with_suffix);
} }
template <typename T>
constexpr std::string_view nameof_raw_impl(std::string_view name) noexcept {
return name;
}
} // namespace detail
template <typename T, template <typename T,
typename = typename std::enable_if<std::is_enum<typename std::decay<T>::type>::value>::type> typename = typename std::enable_if<std::is_enum<typename std::decay<T>::type>::value>::type>
constexpr std::string_view nameof_enum(T value) { constexpr std::string_view nameof_enum(T value) noexcept {
constexpr auto s = std::is_signed<typename std::underlying_type<typename std::decay<T>::type>::type>::value; constexpr auto s = std::is_signed<typename std::underlying_type<typename std::decay<T>::type>::type>::value;
const auto name = detail::nameof_enum_t<typename std::decay<T>::type, s ? -NAMEOF_ENUM_MAX_SEARCH_DEPTH : 0>{}(static_cast<int>(value)); return detail::nameof_enum_t<typename std::decay<T>::type, s ? -NAMEOF_ENUM_MAX_SEARCH_DEPTH : 0>{}(static_cast<int>(value));
#if defined(__clang__) || defined(_MSC_VER)
return detail::pretty_name(name, false);
#elif defined(__GNUC__)
return name;
#else
return {};
#endif
} }
template <typename T> template <typename T>
constexpr std::string_view nameof_type() { constexpr std::string_view nameof_type() noexcept {
return detail::nameof_type_impl<detail::identity<T>>(); return detail::nameof_type_impl<detail::identity<T>>();
} }
template <typename T> template <typename T>
constexpr std::string_view nameof_raw(std::string_view name) { constexpr std::string_view nameof_type(T) noexcept {
return name; return nameof_type<T>();
} }
} // namespace nameof } // namespace nameof
// Used to obtain the simple (unqualified) string name of a variable, member, function, enum, macros. // Used to obtain the simple (unqualified) string name of a variable, member, function, enum, macros.
#define NAMEOF(...) ::nameof::nameof<decltype(__VA_ARGS__)>(#__VA_ARGS__, false) #define NAMEOF(...) ::nameof::detail::nameof_impl<decltype(__VA_ARGS__)>(#__VA_ARGS__, false)
// Used to obtain the full string name of a variable, member, function, enum, macros. // Used to obtain the full string name of a variable, member, function, enum, macros.
#define NAMEOF_FULL(...) ::nameof::nameof<decltype(__VA_ARGS__)>(#__VA_ARGS__, true) #define NAMEOF_FULL(...) ::nameof::detail::nameof_impl<decltype(__VA_ARGS__)>(#__VA_ARGS__, true)
// Used to obtain the raw string name of a variable, member, function, enum, macros. // Used to obtain the raw string name of a variable, member, function, enum, macros.
#define NAMEOF_RAW(...) ::nameof::nameof_raw<decltype(__VA_ARGS__)>(#__VA_ARGS__) #define NAMEOF_RAW(...) ::nameof::detail::nameof_raw_impl<decltype(__VA_ARGS__)>(#__VA_ARGS__)
// Used to obtain the simple (unqualified) string name of a enum variable. // Used to obtain the simple (unqualified) string name of a enum variable.
#define NAMEOF_ENUM(...) ::nameof::nameof_enum<decltype(__VA_ARGS__)>(__VA_ARGS__) #define NAMEOF_ENUM(...) ::nameof::nameof_enum<decltype(__VA_ARGS__)>(__VA_ARGS__)